Pivot & Align Tools (PAT) are a set of macros bundled into a quad menu that allow you to perform various object alignment, pivot alignment and object snapping functions... among others. Most of the functions can operate on a selection of multiple objects at once, including grouped objects as part of the selection (open or closed).
NOTE: This script now handles quad setup for both 3dsmax 2025 and above, as well as previous versions of Max.
See online guide in links section.